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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. class Array1D
  6. {
  7. private:
  8.     vector<int> arr;
  9. public:
  10.     Array1D(size_t num):arr(num){}
  11.     int& operator[] (size_t pos){return arr[pos];}
  12.     inline size_t GetSize(){return arr.size();}
  13. };
  14.  
  15. class Array2D
  16. {
  17. private:
  18.     vector<Array1D> arr;
  19. public:
  20.     Array2D(size_t row,size_t col):arr(row,col){}
  21.     Array1D& operator[] (size_t pos){return arr[pos];}
  22.     inline size_t GetSize(){return arr.size();}
  23. };
  24.  
  25. int main()
  26. {
  27.     cout<<"==value=="<<endl;
  28.     const size_t row = 2;
  29.     const size_t col = 3;
  30.     Array2D arr2D(row,col);
  31.     for(size_t i=0;i<row;i++)
  32.         for(size_t j=0;j<col;j++)
  33.             arr2D[i][j] = i+j;
  34.  
  35.     for(size_t i=0;i<row;i++)
  36.     {
  37.         for(size_t j=0;j<col;j++)
  38.             cout<<arr2D[i][j]<<" ";
  39.         cout<<endl;
  40.     }
  41.  
  42.     cout<<"==size=="<<endl;
  43.     cout<<arr2D.GetSize()<<endl;
  44.     cout<<arr2D[0].GetSize()<<endl;
  45.  
  46.     return 0;
  47. }
  48.  
Success #stdin #stdout 0s 3472KB
comments (?)
stdin
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Standard input is empty
stdout
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==value==
0 1 2 
1 2 3 
==size==
2
3
https://ideone.com/eTTHNU
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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